 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.activities;

 /**
  * An instance of this class describes changes to an instance of
  * <code>IIdentifier</code>. This class does not give details as to the
  * specifics of a change, only that the given property on the source object has
  * changed.
  *
  * <p>
  * This class is not intended to be extended by clients.
  * </p>
  *
  * @since 3.0
  * @see IIdentifierListener#identifierChanged(IdentifierEvent)
  */
 public final class IdentifierEvent {
     private boolean activityIdsChanged;

     private boolean enabledChanged;

     private IIdentifier identifier;

     /**
      * Creates a new instance of this class.
      *
      * @param identifier
      * the instance of the interface that changed.
      * @param activityIdsChanged
      * <code>true</code>, iff the activityIds property changed.
      * @param enabledChanged
      * <code>true</code>, iff the enabled property changed.
      */
     public IdentifierEvent(IIdentifier identifier, boolean activityIdsChanged,
             boolean enabledChanged) {
         if (identifier == null) {
             throw new NullPointerException ();
         }

         this.identifier = identifier;
         this.activityIdsChanged = activityIdsChanged;
         this.enabledChanged = enabledChanged;
     }

     /**
      * Returns the instance of the interface that changed.
      *
      * @return the instance of the interface that changed. Guaranteed not to be
      * <code>null</code>.
      */
     public IIdentifier getIdentifier() {
         return identifier;
     }

     /**
      * Returns whether or not the activityIds property changed.
      *
      * @return <code>true</code>, iff the activityIds property changed.
      */
     public boolean hasActivityIdsChanged() {
         return activityIdsChanged;
     }

     /**
      * Returns whether or not the enabled property changed.
      *
      * @return <code>true</code>, iff the enabled property changed.
      */
     public boolean hasEnabledChanged() {
         return enabledChanged;
     }
 }

